iPhone not saving new contacts
hello,
my sister brought her husband a new iPhone for a present and he set it up but it won't let him add any new contacts to his phone.. He's able to input the number as such but it doesn't save.. he's currently running iOS 18.7.4 but his phone comes up with that the iOS is up to date?
any suggestions much appreciated
MacBook Air 13″, macOS 15.5